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Real mouse position in canvas [duplicate]
... evt.clientX - rect.left,
y: evt.clientY - rect.top
};
}
Just call it from your event with the event and canvas as arguments. It returns an object with x and y for the mouse positions.
As the mouse position you are getting is relative to the client window you'll have to subtract the pos...
Implementation difference between Aggregation and Composition in Java
...e) and aggregation as a weak association (a Car without an Engine makes totally sense, it doesn't even need one in its constructor). Which one to use? Depends on the context.
– Federico Pugnali
Oct 26 '12 at 19:31
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How do CDI and EJB compare? interact?
...s, different implementations or algorithms (so you don't need EJB there at all).
EJB: you do understand, and probably you are confused by @EJB annotation - it allows you to inject implementation into your service or whatever. The main idea is that class, where you inject, should be managed by EJB co...
Python's most efficient way to choose longest string in list?
...this", "does", "work"], key=len)) only returns "this" instead of returning all of the longest strings.
– Anderson Green
Jan 22 '14 at 0:55
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How to get MVC action to return 404
...e returning from within the controller there is also a convenience method called HttpNotFound(). So you could return return HttpNotFound("optional description") instead.
– Luis Perez
Apr 24 '16 at 12:45
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Using IoC for Unit Testing
...
Generally speaking, a DI Container should not be necessary for unit testing because unit testing is all about separating responsibilities.
Consider a class that uses Constructor Injection
public MyClass(IMyDependency dep) { }
...
Why does this code using random strings print “hello world”?
...gorithms are specified for the class Random. Java implementations must use all the algorithms shown here for the class Random, for the sake of absolute portability of Java code."
– FThompson
Aug 27 '13 at 3:05
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Binary Data in JSON String. Something better than Base64
...builtin functions, but the space efficiency is bad -- a 105% expansion (if all input bytes are equally likely) vs. 25% for base85 or 33% for base64.
Final verdict: base64 wins, in my opinion, on the grounds that it's common, easy, and not bad enough to warrant replacement.
See also: Base91 and Bas...
Parallel foreach with asynchronous lambda
I would like to handle a collection in parallel, but I'm having trouble implementing it and I'm therefore hoping for some help.
...
Replace first occurrence of pattern in a string [duplicate]
... much better than the regex imho, this is what the regex will eventually do anyway, after skipping overhead. In very long strings with the result very far at the end, the regex impl might be better as it supports streaming the char array, but for small strings, this seems a lot more efficient...